Jim,
I only have images of one DMS conversion that I came across at NARA on my last trip there in June. I have not gone into the BuShips photos for the DMS conversions yet. Here is a series of shots of Harding, a Square-Bridge Gleaves conversion ... each of the two images I scanned followed by a close-up of the fantail area. But, I would think the stern area would be the same or similar for all DMS units.
I would not be surprised that there were many differences forward of 53 mount on the different DMS conversions, depending on the yard that did the conversion work. The first conversions (1944; DMS-19 through 30, with DMS-26 further modified to the anti-kamikaze mod) kept the standard destroyer AA armament of four 40-mm and seven 20-mm guns (three forward of the bridge, two in the bridge wings {on round-bridge units, none on square-bridge units}, and two amidships {on round-bridge units, and four amidships on square-bridge units} ), the units completed/modified to the DMS Anti-Kamikaze mod with quad 40-mm mounts (1945; DMS-26, 31-42), had two twin 20-mm mounts forward of the bridge and were suppose to have two single 20-mm mounts, but I'm not sure if they mounted them as found on the Benson-Gleaves destroyer anti-kamikaze versions (they mounted them on the main deck amidships, but photos in Wipers book doesn't show any there for the DMS conversions, but there are "something" covered by canvas in the bridge wings in the location where single 20-mm guns were mounted on round-bridge units?).